<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
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        crossorigin="anonymous">

    <!-- 可选的 Bootstrap 主题文件（一般不用引入） -->
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        integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
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        crossorigin="anonymous"></script>
        <style>
            #a{
               background-color: blue;
                

            }
            .row{
                width: 1550px;
                height: 201px; 
            }

            .col-lg-6{
                float: left !important;
                margin: 10px;
                width: 400px;
                height: 185px;

            }
        </style>
</head>

<body>
    <div>
        <div class="col-lg-6">
            <div class="input-group">
                <input type="text" class="form-control" placeholder="Search .....">

                <span class="input-group-btn">
                    <button class="btn btn-info" type="button">
                        <span class="glyphicon glyphicon-search"></span></span>
                </button>
                </span>
            </div>
            <br>
            <div class="row">
                
             <div class="col-lg-6" id="a">
                 <h2 style="color:aliceblue">Sleek</h2>
                 <p style="color:aliceblue">xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                     xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                     xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                 </p>
                 <button class="btn btn-default" type="submit">Read More</button>
             </div>
             

             <div class="col-lg-6" id="a">
                    <h2 style="color:aliceblue">Responsive</h2>
                    <p style="color:aliceblue">xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                        xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                        xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                    </p>
                    <button class="btn btn-default" type="submit">Read More</button>
                </div>

                <div class="col-lg-6" id="a">
                        <h2 style="color:aliceblue">Clean</h2>
                        <p style="color:aliceblue">xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                            xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                            xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                        </p>
                        <button class="btn btn-default" type="submit">Read More</button>
                    </div>

            </div>
           
        
            
            

</body>

</html>